h1,
.enter {
  opacity: 0;
}
.enter-active {
  opacity: 1;
  transition: 2s;
}
.enter-done {
  opacity: 1;
}
.exit {
  opacity: 1;
}

.exit-active {
  opacity: 0;
  transition: 2s;
}
.exit-done {
  opacity: 0;
}
